As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FUEL IMBALANCE GOT PROGRESSIVELY WORSE DURING SHORT FLIGHT FROM SFO TO PDX, ABOUT 1+30 200 POUND IMBALANCE ON THE GROUND, 400 POUND IMBALANCE AT LEVEL OFF, 600 POUND IMBALANCE DURING DESCENT AND LANDING NR 2 TANK HIGH QTY. GROUNDED - YES. ACCOMPLISHED FUEL QTY COMPARISON CK IAW AMM 28-41-00 ALL CK NORMAL WITHIN LIMITS ACCOMPLISHED X-FEED VLV FUNC TEST IAW AMM 28-22-00 20 LBS OF FUEL TRANSFERRED TO NR 2 TANK.